Valve-gear



(No ModeL) A 2 Sheets-Sheet 1.

J. RIDDELL-- VALVE GEAR.

No. 478,022. A' Patented June 28, 1892.-

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VALVE GEAR` (No Model.)

Patented June 28, 1892.

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" UNITED STATES PATENT OFFICE.

JOHN RIDDELLQOF LYNN, ASSIGNOR OF ONE-HALF TO GUYON F. GREEN- WOOD, OF BOSTON, MASSACHUSETTS.' Y

`vALvlla-e EAR.

SPECIFICATION formingpart of Letters Patent No. 478,022, dated June 28, 1892.

Application filed May 20,1891. .Serial No. 393,466. (No model.) 1 v To all whom t may concern.- versal of valve with respect tothe steam and Be it known-that I, JOHN RIDDELL, a citiexhaust ports, and, further, such that adjustzen of the United States, residing` at Lynn, .ment of the pinto a position coaxial with the county of Essex, State of l\Iassachusetts,have vdisk brings the valve to rest andv stops the 5 invented a new and useful Improvement in engine. l S5 Valve-Gears, of which the followingis a speci- In the form of my invention shown in Figs. iication. III to VII the wrist-pin 4 is carried by an My invention relates to an im provcment in arm 8, pivotcd by stud 9 eccentrically of a cap valve-regulators for steam and otherengines, or disk 10, which is fixed by scrcwsll to the IO whereby While the engine is in motion the gear 5, leaving between the disk and gear a 60 valve-action can be increased, diminished, rechamber within which the arm 8 is free to osversed, or suspended at will. cillate. The disk V10v has an arcuate yslot 12 My inventionis applicable to a single or (see Fig.IV) coincident with the center of the compound engine of any7 type using slidedisk l0 and concentric with the pivot-stud 9, valves. and through this slot the wrist-pin4 projects. 65

In the accompanying drawingsIhave shown By adjusting the wrist-pin 4vfrom the center the invention applied to an ordinary comtoward either end of the slot` 12 the gear is pound marine engine; but this is merely by reversed, while -both the throw and lead of way of illustration. vthe valve pass through each' gradation from In said drawings, Figure I is a front, and zero to the full lead and throw. This adjustl7o, Fig. II a side elevation, the latter partly in ment is effected as follows: The gear-Wheel 5 section, of an engine having my invention of oneengine and the cap 13, which serves to applied thereto. Fig. III is a view, partly in cover and support the corresponding mechelevation and partly in axial section, of the -anism of the other engine, are fast to and car- 2 5 reversing-gear. Fig. IV is an end view of the ried by hollow shaft or sleeve 14, mounted in 7 5 same. Fig. V is an axial sectional view of a bearings 15, which are supported from the stapart of the gear in a plane at right angles to tionary frame of the engine in any suitable the plane of section of Fig. III. Fig. VI is manner. I/Vithin each end of the hollow shaft a transverse sectional View on the line VI VI, 14 is a short sleeve 16, serving as a bearing 3o Fig. V, omitting the pinion. Fig. VII is a for thestrunnions 17 at each' end of a Worm- 8o view similar to Fig. IV, but omitting the cap. shaft 1S. On its ends said shaft bears, screwed Figs. VIII and IX represent in face view, tightly downto fixed stops or shoulders, a partly broken away, and axial section a modidisk or arm 19, 'which has an eccentric Wristiication of the invention. pin 20, bearing a blockV 2l, which runs in a The engines l may be of the represented radial groove 22 in the, arm 8. The hollow 85 compound-marine or any other type. In the shaft or sleeve 14 has on diametrically-oppodrawings I have shown the valve-controlling site sides longitudinal slots 23, in which is seta gear arranged to simultaneouslyact upon the nut, whose two parts 24 24a have each of them slide-valves 2 of bothengines. The valvetwo flanges or toes 25 25.

4o rod pitinen 3 3 are strapped to pins 4, from 26 is a sleeve surrounding the hollow shaft 9o which they derive motion, and which are 14 and having annular recesses 27 27 to rethemselves, through the medium of my imccive the flanges 25 of the nut 24 24a. Anproved reversing and varying gear, driven by nular brasses 28 28 in said recesses, on both the gears 5 6 from main crank-shaft 7. The sides of the iianges 25 25, allow the latter to arrangement of the pin 4 and its controlling run freely, with little friction, in said recesses. 95 mechanism is such as to enable a partial shift A straight rack 29 on one side of said sleeve of the pin to a position of greater or less ec- 26 and intermeshing with pinionV 30, having centricity with corresponding valve-stroke, shaft 31 and hand-wheel 32, (see Figs. I, II, and such that this shift, being prolonged beand V,) enable the engineer to shift the said 5o yond the axis of disk rotation, causes resleeve 26 longitudinally of the hollow shaft roo 14. The rotation of the sleeve is prevented by flanges 30a on the pinion or on the rack, or in any other manner, as may be preferred. Vhen the engine is running, and by consequence the gear 5 is driven from the main crank-shaft 7, wrist-pin 4 is revolved about the axis of the gear 5, and the hollow shaft 14, together with the worm-shaft 18, partake of the movement, and the nut 24 24 runs, with the worm-shaft, freely in the sleeve 26. When said sleeve is moved longitudinally of the shaft whereon itis mounted-as, for example, to the left, as shown by the arrow in Fig. III- it carries with it the nut 24 24a and causes a relative rotation of the worin-shaft 18, and consequently of the disk or arm 19, its wristpin 20, sliding block 2l, and the pivoted arm 8, so shifting the ywrist-pin 4 to the left, as shown by the arrow in Fig. IV. The contrary movement of the hand-wheel 82 shifts the wrist-pin 4 in opposite direction, and it will be readily perceived that this may be done whether the engine is at rest or in rapid movement, and that thereby the throw and the direction of the valve are both varied at any instant at pleasure.

An equivalent form of the invention is shown in Fig. VIII, wherein for the disk 19, wrist-pin 20, and sliding block 21 are substituted a segmental rack 33 on the oscillating arm 8, whose shape is changed correspondingly. This arm is oscillated bya segmental pinion 34 direct from the shaft 18.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

i 1. The combination of the valve-rod wristpin, driving-gear therefor, oscillating arm whereto said pin is fixed and which is mounted eccentrically on said driving-gear, and means `for oscillating said arm in an arc which intersects the axis of said driving-gear, substantially as set forth.

2. rlhe combination of the valve-rod wristpin, driving-gear therefor, an oscillating arm wherein said pin is fixed and which is mounted eccentrically on said driving-gear, and

means for oscillating said arm, substantially as set forth.

3. The combination, with driving-gear 5, of the oscillating arm, the wrist-pin 4 thereupon, shit'table to right or left to and from concentricity with said driving-gear, the worm-shaft 18, and the nut 24 on said worm-shaft having means of operation, substantially as described.

4. The combination of the oscillating arm 8 on driving-gear 5, the wrist-pin 4 on said arm, shiftable to and .from the center of said driving-gear, the worin-shaft 18, the nut 24, the sleeve 26, andA means for operating said sleeve, substantially as set forth.

5. The combination of worm-shaft 18, hollow shaft 14, having slots 23, nut 24 24, having ianges 25, and sleeve 26, having recesses wherein said flanges run, substantially as set forth.

6. The combination of wrist-pin 4, wheel 5, receiving motion from the main crank-shaft, arm 8, pivotally mounted on said wheel eccentric of its axis and carrying said wrist-pin, and means for oscillating said arm and wristpin, substantially as set forth.

7. The combination of the wrist pin 4, wheel 5, receiving motion from main crankshaft, hollow shaft 14, carrying said wheel, worm-shaft 18 within said hollow shaft, having operative connection with said wrist-pin, and hand-controlled nut 24 24 for operating said worm-shaft, substantially as set forth.

8. The combination of wrist pin 4, the wheel 5, receiving motion from the main crank-shaft, the pivoted arm 8, carrying said wrist-pin, the Worm-shaft 18, having means of operation, substantially as described, the disk or arm 19, having wrist-pin 20, and the sliding block 21, adapted to engage with said arm 8, all substantially as and for the purposes set forth.

JNO. RIDDELL.

Witnesses:

EDWIN P. BUTTERFIELD, WM. D. POOL. 

